Implementation of Three-Color White Electroluminescence Emission Utilizing Perovskite Nanocrystals and Organic Emitters

In the present study, we report for the first-time three-color whitelight emission with high brightness from white-emitting PeQD organic light-emitting diodes (WPeQD-OLEDs) fabricated using a PeQD material and organic emitters. A WPeQD-OLED bilayer was prepared by depositing a blue-emitting organic layer on top of a CsPb(Br/I)3 QD layer mixed with N9,N10-Bis(4-(tert-butyl) phenyl)-N9,N10-Di-o-Tolylanthracene-9,10-Diamine (p-Tb-o-Me-TAD), which were spin-coated as red and green emitters, respectively. In the WPeQD-OLED device, charge carriers were distributed by an 9-(naphthalen-1-yl)-10- (naphthalen-2-yl)anthracene (α,β-ADN) blue-emitting host material with a deep highest occupied molecular orbital level. The electroluminescence (EL) spectra of the WPeQD-OLEDs showed EL maximum peaks at 460, 527, and 640 nm; the CIE color coordinates of the emitted light were (0.33, 0.40). The EL results confirmed that the maximum luminance was 49,000 cd m^-2 and the maximum luminance efficiency and power efficiency were 4.48 cd A-1 and 2.16 lm W^-1.